[gdm/infer-session-type-when-needed] daemon: Infer session type from desktop file if user has no saved session type

[Ray Strode <halfline src gnome org>]

commit ae75f642859dcfdcfcaaffc617ebe7a68cf0bed7
Author: Ray Strode <rstrode redhat com>
Date:   Wed Sep 29 11:03:41 2021 -0400

    daemon: Infer session type from desktop file if user has no saved session type
    
    The accountsservice user cache file can specify a session type
    associated with the saved session.  This is optional though. If one
    isn't specified GDM needs to figure out the session type based on the
    list of preferred session types for the system and the session file
    itself.
    
    It was failing to do the latter, though.  This commit fixes that.

 daemon/gdm-session.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/daemon/gdm-session.c b/daemon/gdm-session.c
index c1e2be008..4b709731d 100644
--- a/daemon/gdm-session.c
+++ b/daemon/gdm-session.c
@@ -1036,6 +1036,8 @@ worker_on_saved_session_name_read (GdmDBusWorker          *worker,
                 }
                 if (self->saved_session_type != NULL)
                         set_session_type (self, self->saved_session_type);
+                else
+                        update_session_type (self);
         }
 
 }